Motor suspension for oil burners and the like



Aug. 11, 1953 RI w. BECKETT MOTOR SUSPENSION FOR OIL BURNERS AND THELIKE 2 Sheets-Sheet l Original Filed Aug. 7 1947 v INVENTOR. Reginald WBeckett BY zi'mwv am ATTORNEYS A g- 1953 R. w. B ECKETT MOTOR SUSPENSIONFOR OIL BURNERS AND THE LIKE Original Filed Aug. 7, 1947 2 Sheets-+Shest2 INVENTOR. lnald WBeckctt Reg ATTORNEYS Patented Aug. 11, 1953 MOTORSUSPENSION FOR OIL BURNERS AND THE LIKE Reginald W. Beckett, Elyria,Ohio Original application August 7, 1947, Serial No.

Divided and this application September 28, 1949, Serial No. 118,313

15 Claims.

This invention relates to fuel burning heating devices and hasparticular reference to oil burners of the pressure atomizing type inwhich fuel oil is discharged under pressure through a small orifice ornozzle into a combustion chamber and is burned While suspended in thecombustion air that is supplied by a power driven fan. The presentapplication is a division of my copending application for patent, SerialNo. 766,967, filed August 7, 1947, now Patent No. 2,506,192, issued May2, 1950, for Oil Burner.

Oil burners and related devices of the type in- Volved in the presentinvention have been highly developed and are presently in common use inlarge numbers. It is desirable, however, to reduce the cost ofmanufacture of such devices so as to make them more readily available tothe public at large. Other improvements sought are along the lines ofgreater safety, efficiency, and quieter operation,

It is therefore one of the principal objects of the present invention toprovide a generally improved motor and fuel pump suspension in whichnumerous advantageous features of construction and arrangements of partshave been incorporated to obtain economic manufacture and operation,relatively silent operation, and safety.

Economy is obtained by unique design features which facilitate assemblywith a minimum of machining of parts and without special skill or thenecessity for the use of special tools, lies, and fixtures. Reduced costis also obtained by the elimination of parts to simplify design andinstallation.

Noise reduction during operation of the burner is obtained through animproved mounting means for supportin the so-called power unit of theburner, which comprises the electric drive motor and the fan and thefuel Pump actuated thereby. Additional noise reduction is obtainedthrough the provision of a balanced structure so supported as tominimize vibration and oscillation during operation.

Other objects and advantages will become apparent from the followingdetailed description of a burner embodying the principles of the presentinvention, such description being made in connection with theaccompanying drawings forming a part of this specification.

In the drawings:

Figure 1 is a side elevational view partly in section and with partsbroken away and removed showing the oil burner structure;

Fig. 2 is a fragmentary detail view partly in section and with partsbroken away taken through the bell-shaped member which mounts the fuelpump on the end of the electric drive motor;

Fig. 3 is a transverse sectional detail taken substantially on the line33 of Fig. 1, parts of the burner being broken away and removed; and

Fig. 4 is a transverse sectional detail taken substantially on the line44 of Fig. 1.

General arrangement The present invention relates generally to fuelburning devices of the type disclosed in my prior Patent No. 2,310,274and the patents referred to therein. Referring now to the drawings bynumerals of reference which indicate like parts throughout the severalviews, the burner is seen to comprise an upright housing structurehaving spaced substantially parallel front and rear walls i and 2respectively, substantially parallel side walls, one of which isindicated at 4, and a curved top wall 5. The housing is of cast metalsuch as iron or aluminum and includes a bottom 6 which is integral withthe front and rear walls.

The housing is supported on a pedestal structure which comprises a castmetal base 1 and one or more supporting or spacing blocks or shells 8and 9.

In each corner of the spacing shell is an integral column which projectsbelow the level of the bottom edges ll of the shell so as to providedependin foot portions I2 received in mating recesses formed in the topof the base 1 or in the top of the next lower spacing shell. The footportions of the columns of the spacing shell 8 bear on the upper ends l5of the columns of the spacing shell 9. The base 1 is formed with thicksectioned bosses I! having flat tops recessed below the level of thesquare top of the base to serve as footings for the spacing shellcolumns.

The upper shell 8 differs slightly from the spacing shell 9 in that lugsl8 thereof extend upwardly above the level of the top edges of the shelland interfit in mating recesses formed in the corners of a square socketin the bottom 6 of the housing.

The housing is secured to the base by a vertical stud or through bolt ISthe upper end of which is threadedly secured in the housing bottom iiand the lower end of which extends downwardly through and is centered inan opening in platform portion 20 of the case. A nut 2| is tightenedagainst the underside of the base platform to hold the assemblytogether.

Power unit An electric motor 22 supplies the energy for driving squirrelcage fan or sirocco type blower 23 which is received in a chamber formedin the upper portion of the housing. The fan, inserted into the blowerchamber through a large diameter opening 3! provided in the rear wall 2of the housing, is secured on one end 25 (Fig. 1) of the motor shaft.

Motor shaft portion 2% (Fig. 2) which projects from the other or flatill of the motor is sur- 60 rounded by a bell-shaped support member 28that is secured to the motor end 21 by diametrically located cap screws,one of which is indicated at 28. The bell member 28 is formed with anoffset circular flange 30 which embraces the motor end 21 and provides acircumferentially extending internal shoulder against which the motorend is seated and located.

The small end of the bell member 28 is formed with a centrally locatedintegral cylindrical sleeve 32 having an internal cylindrical bore 33that is substantially co-axial to the rotational axis of the motorshaft. Received within the bore or socket 33 is a mating cylindricalplug member 34 formed on a fuel oil pump 35.

The pump plug 34 contains a central journal for pump shaft 36 which isthus disposed in end to end co-axial relation to the motor shaft end 26.A flexible drive coupling connects the shaft ends, one coupling part 3'!being secured by a set screw on the motor shaft end 26 and anothercoupling part 38 being secured, also by a set screw, on pump shaft 36. Aresilient deformable element 39 is interposed between the coupling parts31 and 38 to transmit the torque while providing for slight misalignmentor displacement of the shafts. One or more set screws 40 threadedthrough the bell sleeve 32 are engaged in detents in the pump plug 34 tolock the latter in the bell member sleeve and to retain the pump inpre-determined upright position.

The motor 22, together with the fan 23 and the pump 35 secured onopposite ends thereof, are collectively referred to and comprise aremovable power unit. This unit operates the oil burner, the pumpfeeding oil under pressure and the fan supplying combustion air. It istherefore extremely desirable to be able to replace the power unitshould a failure occur in either the pump fan or motor so that the oilburner can be continued in service with a minimum of delay orinterruption.

Resilient suspension The present invention is chiefly concerned with aunique suspension means for the power unit. A bracket 42 having atransversely curved body portion 43 is concave on its underside so as tofit over and partially embrace the top of the motor. The body of thebracket is generally concentric to the curvature of the motor, thelatter being suspended in spaced relation underneath the bracket as willlater appear. At one end of the curved body 43 the bracket is for-medwith an integral depending flange 44 which is disposed flatwise againstthe rear wall 2 cf the housing structure and is secured to the latterover the opening 31 by cap screws 45. The bracket flange 44 thus closesthe relatively large rear opening in the housing wall 2 through whichthe fan 23 is inserted into the fan chamber 24, the bracket flangehaving a relatively small opening 46 which closely surrounds the motorshaft end 25.

Along opposite sides of the bracket at the lower edges of the arcuate orcurved body 43 are horizontal portions or lateral extensions 41 whichterminate in depending flanges 48. Rubber tension type suspensionmembers 50 are secured by bolts 5| to the underside of the lateralbracket extensions at the front and rear ends of the latter, the boltsbeing threaded into metal elements embedded in the rubber of thesuspension members.

One pair of the resilient rubber members 50 are attached by bolts 52 tohalf straps 53 and 54 which cooperatively embrace the motor 22, thebolts 52 passing through radial cars 55 on the ends of the half straps,and being threaded into metal elements embedded in the rubber of thesuspension members. The half strap 53 passes over the top of the forwardportion of the motor and is disposed underneath the curved body portion43 of the bracket, while the half strap 54 extends underneath theforward portion of the motor to support the latter. The bolts 52 drawthe half straps tightly about the frame of the motor so as to clamp themotor in place and prevent longitudinal movement thereof. The other pairof the resilient rubber suspension members 50, which depend fromportions of the bracket extensions 41 that project rearwardly of thecurved body portion 43 of the bracket, are secured by bolts 56, threadedinto embedded metal elements, to diametrically disposed integral ears5'! which extend outwardly from opposite sides of the bell-shapedsupport member 28.

Thus the power unit is resiliently suspended from the bracket 42 by aplurality of resilient rubber members in tension. Extremely quiet burneroperation results from this type of mount and the attachment of theresilient elements 53 to different zones along the length of the motorminimizes lateral displacement of the motor andserves to hold the motorin pre-determined relative position with respect to the burner housingstructure.

In manufacturing the burner, the motor, bell member, pump and fan areassembled together on the bracket 42 on this sub-assembly is thenmounted as a unit on the housing simply by insorting the fan into thechamber 24 through the opening 3| in the housing wall 2 and securing thebracket flange 44 in place by the cap screws 45. The arrangement of thepower unit and the attaching bracket as a sub-assembly facilitateseconomical mass production, the parts being interchangeable, and alsopermits replacement of the power unit in the field should it becomedesirable to retain the burner in continuous service while repairs arebeing made on the motor or fuel pump.

Air induction and control Air is drawn into the fan chamber through atapered opening formed in the front wall I of the housing. Disposedagainst the outside of the front wall I of the housing and over the airinlet opening into the fan chamber so as to control the flow of airthrough such opening, is a hood which may be of cast metal.

The bottom of the hood is open to permit the inflow of air under thecontrol of a sheet metal gate pivotally mounted off center for turningmovement about a horizontal axis. The gate is supported on pins 66 thatare threaded through aligned openings in bottom portions of the hoodside walls, the pins being held against turning by lock nuts 61. Thegate is moved upwardly to open position by inflowing air.

The rear edges of the hood are directed toward an integral outstandingrib '69 which is formed on or characters the front wall I of the housingand has the same contour or outline shape as the edges of the hoodwalls. The hood is spaced from the housing rib 69 by three integralbosses or raised portions, one of which is indicated at 10. Cap screwsor bolts 12 pass through openings in ears 13 provided one on each sideof the hood and are threaded into the front wall I of. the housing. Aclearance 14 is provided between the edges of the hood walls and the rib69 on the front wall l of the housing.

In adjusting the burner for different oil rates the quantity ofcombustion .air drawn into the fan chamber through the opening in thebottom of the hood 60 is regulated by controlling the extent to which.the gate opens. The air inlet controlgate is adjusted While the burneris in operation as by means of a rod which extends vertically throughthe interior of the hood.

To facilitate the turning of the control rod in adjusting the airinduction system of the burner a knurled thumb wheel 80 is threaded ontothe top of the rod above the top wall .of the hood and is held againstturning on the rod by lock inut 8|.

Below the air induction hood 60 an elongated tapered tube 88 of circularcross section is attached by bolts, one of which is indicated .at 81, tothe front wall I of the housing structure over an opening whichcommunicates with an air passage formed in the housing structure belowthe fan chamber. Combustion supporting air drawn into the housingthrough the hood 16B is forced by the fan 23 down into the air chamberin the bottom of the housing and thence out through the circular passagein the air tube 85 and through a burner head 96 which extends throughthe walls of the fire box of the combustion chamber, not shown.

Fuel .oil atomization and electrical ignition Fuel oil from a source notshown is supplied by the pump 35 and forced from the latter through abendable conduit 88 to a rigid conduit 89 supported by a bracket 9| inthe center of the air tube 86. Forwardly of the bracket c! the fuelconduit 89 carries a spider 93 that locates the conduit in the center ofthe air tube. A hollow manifold S54 threaded on the end of the conduit89 mounts a nozzle 95 to project fuel forwardly through the open mouthof the burner head 90 of the combustion chamber.

The sparking ends of ignition electrodes, one of which is shown at 96,are received through pairs of spaced insulators 91 supported by clamps98 on the rigid fuel conduit 89. Electrical current for energizing theignition spark across the ends of the electrodes 95 is supplied by atransformer lllfl normally disposed across an opening through the rearwall 2 of the housing structure. The transformer serves .as a closurefor the opening in the rear wall and the electrodes 96 carry contactelements that automatically make electrical connection between theelectrodes and the transformer terminals when the transformer is swungto closed position across the housing opening.

The bendable conduit 88 extends through a lateral extension of the rearopening in the housing structure to one side of the transformer I and isdisconnected from the fuel pump 35 when it is desired to remove thepower unit or the fuel conduit and ignition electrode assembly from theburner. A base portion ill! on the bracket 9| is apertured to receive anupstanding bolt 102 that extends upwardly through a hole in the bottom 6of the burner housing. A nut I03 on the bolt m2 is tightened downagainst the base lill of the bracket to secure the latter in place, thebolt having a square or non-circular head I04 that is received in amating recess formed in the underside of the housing.

An integral finger Hi which extends inwardly from one of the walls ofthe uppermost spacing shell or block 3 engages the head I04 of the bolt.

iii)

Electrical control and wiring The side wall 4 of the burner housing isformed to receive a junction box I06 to which is mounted the controlmechanism (not shown). Electrical leads or wires II I and I I2. from themotor 22 are contained in an insulated conduit .Ili! which runs throughan opening in the rear wall of the housing and through an internalchamber of the housing, the leads being brought into the junction boxand connected to terminals I98 and I09. Leads or wires H4 and H5 fromthe transformer I00 are also contained in an insula'ted conductor orconductors which extend through an internal chamber in the burnerhousing and are brought into the junction box and connected one to theterminal we and the other to terminal H9.

The relay of the safety combustion control mechanism for governing theburner operation is contained in a metal box which fits over thejunction box I06. Electrical connection is made with the variousterminals in the latter .by captive screws or other means not shown.Besides the motor and transformer, other devices may be connected intothe control mechanism through the junction box Hit, the leads or wiresfrom these devices being attached to terminals in the junction box thatare contacted by the captive screws of the relay box. The control systemdesirably employs a conventional photoelectric or phototube cell H8 tomonitor the operation of the burner. The photocell is mounted in the airtube 86, .in a container I25 which faces toward the open mouth of theburner head 99. The container is supported on a bracket [2B which isslidable .to different positions along the rigid fuel conduit 89.

A flexible electric conductor JIRI is connected to the photocell H8through the rear of the container I25 and extends into the junction box106 where it is connected to terminal I22. The 'phototube cathode isgrounded to the burner housing structure. A set screw I23 is provided inthe photocell bracket 12!! to retain the latter in adjusted position onthe rigid oil conduit. Reference is made to my copending applicationSerial No. 149,550, filed l llarch 14, 1 950, which claims certain ofthe features disclosed herein.

In accordance with the patent statutes the principles of the presentinvention may be utilized in various ways, numerous modifications andalterations being contemplated, substitution of parts and changes inconstruction being resorted .to as desired, it being understood that theembodiment shown in the drawings and described above is given merely forpurposes of explanation and illustration without intending to limit thescope of the claims to the specific details disclosed.

What I claim and desire to secure by United States Letters Patent is:

1; In a pressure atomizing oil burner of the type having a power unitcomprising an electric motor and a fan and a fuel pump secured to anddriven by the motor, the improvement which comprises a cantilever typebracket for supporting the power unit, said bracket being secured to thehousing structure of the burner and extend ing laterally therefrom, saidbracket also having a concave underside to receive the electric motor,and means resiliently suspending the motor from spaced portions of thebracket wh reby the underside of the motor is substantiallyunobstructed, the suspending means including elements secured to andlocated on opposite sides of the motor,

said elements being disposed wholly below the level of the top of themotor and separately secured to spaced portions of the bracket, themotor and the bracket being generally spaced from and making connectionwith one another solely through said suspending means.

2. In an oil burner of the pressure atomizing type, a housing structuredefining a fan chamber, a bracket member secured to the housingstructure and extending laterally therefrom in cantilever fashion, saidbracket being curved across its width and having a concave underside, anelectric motor disposed in the concavity of the underside of thebracket, means suspending the motor from the bracket, the suspendingmeans including elements secured to and located on opposite sides of themotor, said elements being disposed wholly below the level of the top ofthe motor and separably secured to spaced portions of the bracket, themotor and the bracket being generally spaced from and making connectionwith one another solely through said suspending means, a fan disposed inthe fan chamber and connected to the electric motor to be supported anddriven thereby, and a fuel pump for supplying liquid fuel to the burnerconnected to the motor to be supported and driven thereby.

3. In an oil burner having a housing and m electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, and resilient elements tensioned between spaced pointson opposite sides of the cantilever portion of the bracket and the motorto suspend the motor from the bracket in generally spaced relation, thetensioned resilient elements constituting the sole supporting connectionbetween the bracket and the motor.

4. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, flange means extending horizontally from the oppositesides of the bracket cantilever portion, and resilient elementsconnected between the horizontal flange means of the bracket and themotor to suspend the motor from the bracket in generally spacedrelation, the resilient elements constituting the sole supportingconnection between the bracket and the motor.

5. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, flange means extending horizontally from the oppositesides of the bracket cantilever portion, means on the motor providinghorizontally extending ears, and resilient elements connected betweenthe horizontal flange means of the bracket and the horizontal ears onthe motor to suspend the latter from the bracket in generally spacedrelation.

6. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, the opposite sides of the cantilever portion beingformed with integral, generally horizontal flanges disposed on oppositesides of the motor intermediate the top and bottom of the latter, andmeans connected between the horizontal flanges of the bracket and themotor to suspend the motor from the bracket in generally spacedrelation.

7. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, the opposite sides of the cantilever portion beingformed with integral, generally horizontal flanges disposed on oppositesides of the motor intermediate the top and bottom of the latter, andresilient elements tensioned between the bracket flanges and the motorto suspend the motor from the bracket in generally spaced relation, theresilient elements constituting the sole supporting connection betweenthe bracket and the motor.

8. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket including a cantilever portion extending horizontally from thehousing and having a concave underside received embracingly about thetop of the motor, a bell extension removably mounted on one end of themotor, a pair of connecting elements extending between spaced points onopposite sides of the cantilever portion and the motor, and another pairof connecting elements extending between other spaced points on oppositesides of the cantilever portion and the bell extension to suspend themotor and the bell e tension from the bracket in generally spacedrelation.

9. In an oil burner having a housing and an electric motor, incombination, a bracket secured to and supported by the housing, thebracket having a generally horizontally extending cantilever part thatincludes a portion overlying and substantially conforming to the shapeof the top surface of the motor, a pair of connecting elements extendingbetween spaced points on opposite sides of the cantilever part and themotor to suspend the motor from the bracket in generally spacedrelation, the cantilever part of the bracket also includingsubstantially horizontal flanges extending beyond the end of theconforming portion of the bracket, a bell extension removably mounted onone end of the motor, and another pair of connecting elements extendingbetween the extended bracket flanges and the bell extension to suspendthe latter from the bracket.

10. In combination, a power unit and a support therefor, the unitincluding a motor having a rotatable shaft and journal means for thelatter, a bell extension removably mounted on one end of the motor, adevice carri d solely by the bell extension and including a rotatableshaft, a coupling connecting the shafts for driving of the device shaftby the motor shaft, the support including a housing and a contileverbracket on the housing, said bracket having a generally horizontallyextending, part that overlies and. substantially conforms to the top ofthe motor, a pair of connecting elements extending between spaced pointson opposite sides of the horizontal part of the bracket and the motor tosuspend the latter beneath the cantilever bracket in spaced relation,and another pair of connecting elements extending between other spacedpoints 9 on opposite sides of the horizontal part of the bracket and thebell extension to suspend the latter from the bracket.

11. In combination, a power unit and a support therefor, the unitincluding a motor having a rotatable shaft and journal means for thelatter, a bell extension removably mounted on one end of the motor, adevice carried solely by the bell extension and including a rotatableshaft, a coupling connecting the shafts for driving of the device shaftby the motor shaft, the support including a housing and a cantileverbracket on the housing, said bracket having a generally horizontallyextending part that overlies and substantially conforms to the top ofthe motor, the overlying part of the bracket being discontinuous acrosssaid end of the motor and the bracket having extension portions disposedon opposite sides of the motor and extending beyond said motor end andalongside the bell extension, and spaced pairs of connecting elementssuspending the unit from the bracket in generally spaced relation to thelatter, one pair of said connecting elements extending between thebracket and the motor and another pair of said connecting elementsextending between the extension portions of the bracket and the bellextension.

12. In combination, a power unit and a support therefor, the unitincluding a motor having a rotatable shaft and journal means for thelatter, a bell extension removably mounted on one end of the motor, adevice carried solely by the bell extension and including a rotatableshaft, a coupling connecting the shafts for driving of the device shaftby the motor shaft, th support including a bracket having generallyhorizontal components extending along opposite sides of the motor and ofthe bell extension, and spaced pairs of resilient connectors mountingthe unit on the support, one pair of said connectors extending betweenthe horizontal components of the bracket and the motor and another pairof said connectors extending between such components and the bellextension, the resilient connectors constituting the sole supportingconnection between the unit and the support.

13. In combination in an oil burner, a housing through which combustionsupporting air is conducted, an electric motor having a rotatable shaft,said motor also having opposite ends L through which the motor shaftprojects, an air fan secured on one end of the motor shaft and disposedwithin the housing, a supplemental support member disposed over theother end of the motor shaft, said supplemental support member beingsecured on the motor for facile removal and replacement and being formedwith an opening of substantially uniform section substantially alignedwith the motor shaft, an oil feeding pump formed with a plug portion,said plug portion of the pump being disposed Within the opening in thesupplemental support member and the pump being substantially whollysupported by said supplemental support member, said pump having a shaftextending through the plug portion and projecting into the interior ofthe supplemental support member, coupling means connecting the saidother end of the motor shaft to the projecting pump shaft, and means onthe housing having connection with the motor to support the motor, fan,supplemental support member and pump as a unit.

14. In combination in an oil burner, a housing through which combustionsupporting air is conducted, an electric motor having a rotatable shaft,said motor also having opposite ends through which the motor shaftprojects, an air fan secured on one end of the motor shaft and disposedwithin the housing, a supplemental support member disposed over theother end of the motor shaft, said supplemental support member beingsecured on the motor for facile removal and replacement and being formedwith on opening of substantially uniform section substantially alignedwith the motor shaft, an oil feeding pump formed with a plug portion,said plug portion of the pump being disposed within the opening in thesupplemental support member and the pump being substantially whollysupported by said supplemental support member, said pump having a shaftextending through the plug portion and projecting into the interior ofthe supplemental support member, coupling mean connecting the said otherend of the motor shaft to the projecting pump shaft, a bracket securedto the housing and extending outwardly from the housing cantileverfashion and. means connecting the motor to the cantilever bracket tosupport the motor, fan, supplemental support member and pump as a unitsubstantially wholly by said cantilever bracket.

15. In combination in an oil burner, a housing through which combustionsupporting air is conducted, an electric motor having a rotatable shaft,said motor also having oppositeends through which the motor shaftprojects, an air fan secured on one end of the motor shaft and disposedwithin the housing, a supplemental support member disposed over theother end of the motor shaft, said supplemental support member beingsecured on the motor for facile removal and replacement and being formedwith an opening of substantially uniform section substantially alignedwith the motor shaft, an oil feeding pump formed with a plug portion,said plug portion of the pump being disposed within the opening in thesupplemental support member and the pump being substantially Whollysupported by said supplemental support member, said pump having a shaftextending through the plug portion and projecting into the interior ofthe supplemental support member, coupling means connecting the saidother end of the motor shaft to the projecting pump shaft, a bracketsecured to the housing and extending substantially horizontallyoutwardly therefrom in cantilever fashion, and means elastic resilientlysuspending the motor from and generally below the cantilever bracketyieldingly to suspend the motor, fan, supplemental support member andpump as a unit substantially wholly from said cantilever bracket.

REGINALD W. BECKETT.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,991,194 Child Feb. 12, 1935 2,209,477 Reibel July 20, 19402,253,597 Wyne Aug. 26, 1941 2,281,144 Dillon Apr. 28, 1942 2,287,462Beckett June 23, 1942 2,309,683 Wahlmark Feb. 2, 1943 2,405,196 Elliotet al. Aug. 6, 1946 FOREIGN PATENTS Number Country Date 153,733 GermanyFeb. 15, 1938.

